[IronPython] Questions for FAQ or User Guide

[Richard Monson-Haefel]

It might be better if IronPython auto converted the list of real number 
to an array in this case. If, that is, all the types in the list can be 
widened to the correct type, or if the parameter is an array of 
objects. That way you don't have to call an explicit method to set the 
list to an array of Double types.

The reason, I think this is important, is that in Python developers 
will avoid explicit typed of arrays  in favor of loose typed lists 
because its more Pythonic. Since interaction with general purpose 
languages (strongly typed) will require more strict typing, the 
interpreter or compiler should make that transformation (from List to 
array of doubles) implicitly, or if it can't be done throw an 
exception.  Otherwise, you are forcing IronPython developers to adhere 
to strict typing whenever they script interactions of objects defined 
by general purpose languages like C#.

richard

On Apr 19, 2005, at 6:36 PM, Martin Maly wrote:

>
>
>>>> John A. Tenney Wrote:
>>>>
>>>> 1. I'd like to pass an array of 6 doubles to a method, but get an
> error message.
>>>> For example, the "myMethod" call below fails when it requires a
> double array.
>>>> array=[1, 2, 3.5, 4]
>>>> myObject.myMethod(array)
>
> If you create the array using the syntax above, you end up with object
> of type list.
> To create .Net array, you can do the following:
>
>>>> import System
>>>> array = System.Array.CreateInstance(System.Double, 5)
>>>> array[0]=1.3
>>>> array
> System.Double[](1.3, 0, 0, 0, 0)
>
> And call:
>
> myObject.MyMethod(array)